libwab* online for Outlook Express to Thunderbird migration

This will add dump files with all of the printable strings in your .wab file. If your data are not in the output of this command then they are probably gone. The only thing you can try beyond this is a hex editor. ...but it's very unlikely that you'll find anything good.

* developed by Sean Loaring in 2006, licensed under the GNU Library GPL. Online implementation by 7xl.org. The original command line utility is available at archive.org as filewut.com is closed. There's a binary for Windows and C source files for Linux that need to be compiled. Runs fine with gcc 4.8 on eg Ubuntu 14.